/* Modern PRC Login Page Styles */

:root {
  /* PRC Brand Colors */
  --prc-red: #a00000;
  --prc-red-dark: #800000;
  --prc-red-light: rgba(160, 0, 0, 0.1);
  --prc-blue: #222e60;
  --prc-blue-dark: #1a2347;
  --prc-blue-light: #f0f8ff;

  /* Additional Colors */
  --white: #ffffff;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;

  /* Status Colors */
  --success-color: #10b981;
  --error-color: #ef4444;
  --warning-color: #f59e0b;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 0.75rem;
  --spacing-lg: 1rem;
  --spacing-xl: 1.25rem;
  --spacing-2xl: 1.5rem;
  --spacing-3xl: 2rem;
  --spacing-4xl: 2.5rem;
  --spacing-5xl: 3rem;
  --spacing-6xl: 4rem;

  /* Typography */
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;

  /* Effects */
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --border-radius-xl: 16px;
  --border-radius-2xl: 20px;
  --border-radius-full: 9999px;

  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1),
    0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1),
    0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1),
    0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--gray-700);
  background-color: var(--gray-50);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Navigation */
.login-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: linear-gradient(135deg, var(--prc-red) 0%, var(--prc-blue) 100%);
  color: white;
  border-bottom: none;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-6xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.nav-brand {
  display: flex;
  align-items: center;
}

.nav-brand a {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  text-decoration: none;
  color: white;
}

.nav-logo {
  width: 48px;
  height: auto;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.brand-text h1 {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: white;
  line-height: 1.2;
  margin: 0;
}

.brand-text span {
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-2xl);
}

.nav-tags {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  margin-right: var(--spacing-xl);
}

.nav-tag {
  background: rgba(255, 255, 255, 0.2);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--border-radius);
  font-size: var(--font-size-xs);
  font-weight: 600;
  text-align: center;
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  white-space: nowrap;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.1);
  color: white;
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.back-btn:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-1px);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Login Section */
.login-section {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.login-background {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--prc-blue-dark), var(--prc-blue));
}

.login-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(34, 46, 96, 0.9) 0%,
    rgba(26, 35, 71, 0.8) 50%,
    rgba(160, 0, 0, 0.9) 100%
  );
}

.background-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 6px;
  height: 6px;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.particle:nth-child(1) {
  top: 20%;
  left: 20%;
  animation-delay: 0s;
}
.particle:nth-child(2) {
  top: 40%;
  left: 80%;
  animation-delay: 1s;
}
.particle:nth-child(3) {
  top: 60%;
  left: 40%;
  animation-delay: 2s;
}
.particle:nth-child(4) {
  top: 80%;
  left: 70%;
  animation-delay: 3s;
}

.login-container {
  position: relative;
  z-index: 10;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-6xl);
}

.login-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-6xl);
  align-items: center;
}

/* Welcome Section */
.login-welcome {
  color: white;
}

.welcome-content h2 {
  font-size: var(--font-size-4xl);
  font-weight: 800;
  margin-bottom: var(--spacing-xl);
  line-height: 1.2;
  animation: fadeInLeft 0.8s ease-out;
}

.welcome-content p {
  font-size: var(--font-size-lg);
  line-height: 1.7;
  margin-bottom: var(--spacing-4xl);
  opacity: 0.9;
  animation: fadeInLeft 0.8s ease-out 0.2s both;
}

.welcome-features {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  animation: fadeInLeft 0.8s ease-out 0.4s both;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--border-radius-lg);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

.feature-item:hover {
  background: rgba(255, 255, 255, 0.15);
  transform: translateX(5px);
}

.feature-item i {
  font-size: var(--font-size-xl);
  color: white;
  width: 24px;
  text-align: center;
}

.feature-item span {
  font-weight: 600;
  font-size: var(--font-size-base);
}

/* Login Form Section */
.login-form-section {
  display: flex;
  justify-content: center;
}

.login-box {
  background: white;
  border-radius: var(--border-radius-2xl);
  padding: var(--spacing-5xl);
  width: 100%;
  max-width: 450px;
  box-shadow: var(--shadow-2xl);
  border: 1px solid var(--gray-200);
  animation: fadeInRight 0.8s ease-out;
}

.login-header {
  text-align: center;
  margin-bottom: var(--spacing-4xl);
}

.login-header h3 {
  font-size: var(--font-size-3xl);
  font-weight: 800;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.login-header p {
  color: var(--gray-600);
  font-size: var(--font-size-base);
}

/* Error Alert */
.error-alert {
  background: #fef2f2;
  border: 1px solid #fecaca;
  color: var(--error-color);
  padding: var(--spacing-lg);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--spacing-xl);
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  font-size: var(--font-size-sm);
  animation: shake 0.5s ease-in-out;
}

/* Form Styles */
.login-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-2xl);
}

.form-group {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease-out forwards;
}

.form-group.animate-in {
  animation-play-state: running;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
}

.form-group label i {
  color: var(--prc-red);
  width: 16px;
  text-align: center;
}

.form-group input {
  width: 100%;
  padding: var(--spacing-lg);
  border: 2px solid var(--gray-300);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-base);
  transition: var(--transition);
  background-color: var(--white);
}

.form-group input:focus {
  outline: none;
  border-color: var(--prc-red);
  box-shadow: 0 0 0 3px rgba(160, 0, 0, 0.1);
}

.form-group input::placeholder {
  color: var(--gray-400);
}

/* Password Input */
.password-input {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: var(--spacing-lg);
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--gray-500);
  cursor: pointer;
  font-size: var(--font-size-base);
  transition: var(--transition);
  padding: var(--spacing-sm);
}

.password-toggle:hover {
  color: var(--prc-red);
}

/* Login Button */
.login-btn {
  background: linear-gradient(
    135deg,
    var(--prc-red) 0%,
    var(--prc-red-dark) 100%
  );
  color: white;
  border: none;
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  font-size: var(--font-size-lg);
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.login-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.2),
    transparent
  );
  transition: left 0.5s ease;
}

.login-btn:hover::before {
  left: 100%;
}

.login-btn:hover {
  background: linear-gradient(135deg, var(--prc-red-dark) 0%, #600000 100%);
  transform: translateY(-2px);
  box-shadow: var(--shadow-xl);
}

.login-btn:active {
  transform: translateY(0);
}

/* Login Footer */
.login-footer {
  margin-top: var(--spacing-4xl);
}

.divider {
  position: relative;
  text-align: center;
  margin: var(--spacing-3xl) 0;
}

.divider::before {
  content: "";
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--gray-300);
}

.divider span {
  background: white;
  color: var(--gray-500);
  padding: 0 var(--spacing-lg);
  font-size: var(--font-size-sm);
  position: relative;
}

.register-link {
  text-align: center;
  color: var(--gray-600);
  font-size: var(--font-size-sm);
}

.register-link a {
  color: var(--prc-red);
  text-decoration: none;
  font-weight: 600;
  margin-left: var(--spacing-xs);
  transition: var(--transition);
  position: relative;
}

.register-link a::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--prc-red);
  transition: width 0.3s ease;
}

.register-link a:hover {
  color: var(--prc-red-dark);
}

.register-link a:hover::after {
  width: 100%;
}

/* Animations */
@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInRight {
  from {
    opacity: 0;
    transform: translateX(30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }
  25% {
    transform: translateX(-5px);
  }
  75% {
    transform: translateX(5px);
  }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .nav-tags {
    display: none;
  }

  .nav-container {
    padding: 0 var(--spacing-3xl);
  }

  .login-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-4xl);
  }

  .login-welcome {
    text-align: center;
  }

  .welcome-content h2 {
    font-size: var(--font-size-3xl);
  }
}

@media (max-width: 768px) {
  .nav-container {
    height: auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    flex-direction: column;
    gap: var(--spacing-lg);
  }

  .nav-brand a {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }

  .brand-text h1 {
    font-size: var(--font-size-lg);
  }

  .login-container {
    padding: var(--spacing-3xl) var(--spacing-xl);
  }

  .login-content {
    gap: var(--spacing-3xl);
  }

  .welcome-content h2 {
    font-size: var(--font-size-2xl);
  }

  .welcome-content p {
    font-size: var(--font-size-base);
  }

  .login-box {
    padding: var(--spacing-4xl);
  }

  .feature-item {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  .login-container {
    padding: var(--spacing-2xl) var(--spacing-lg);
  }

  .login-box {
    padding: var(--spacing-3xl);
  }

  .login-header h3 {
    font-size: var(--font-size-2xl);
  }

  .welcome-features {
    gap: var(--spacing-lg);
  }

  .feature-item {
    flex-direction: column;
    text-align: center;
    gap: var(--spacing-sm);
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High contrast mode */
@media (prefers-contrast: high) {
  .login-box,
  .form-group input,
  .login-btn {
    border: 2px solid var(--gray-900);
  }
}

/* Focus styles for accessibility */
.login-btn:focus,
.back-btn:focus,
.register-link a:focus,
.password-toggle:focus {
  outline: 3px solid var(--prc-red);
  outline-offset: 2px;
}

.form-group input:focus {
  outline: 3px solid var(--prc-red);
  outline-offset: 2px;
}

/* Touch device improvements */
@media (hover: none) and (pointer: coarse) {
  .login-btn,
  .back-btn,
  .password-toggle {
    min-height: 44px;
    min-width: 44px;
  }

  .form-group input {
    font-size: 16px; /* Prevents zoom on iOS */
    min-height: 44px;
  }

  .feature-item:hover {
    transform: none;
  }

  .register-link a {
    padding: var(--spacing-sm) 0;
    display: inline-block;
  }
}

/* Custom scrollbar */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-100);
}

::-webkit-scrollbar-thumb {
  background: var(--prc-red);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--prc-red-dark);
}

/* iOS and Safari specific fixes */
.form-group input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
}

/* Fix for viewport height issues on mobile */
@supports (min-height: 100dvh) {
  .login-section {
    min-height: 100dvh;
  }
}

/* Print styles */
@media print {
  .login-nav,
  .background-particles,
  .login-overlay {
    display: none !important;
  }

  .login-section {
    background: none !important;
    color: var(--gray-900) !important;
    min-height: auto !important;
  }

  .login-welcome {
    color: var(--gray-900) !important;
  }

  .login-box {
    box-shadow: none !important;
    border: 2px solid var(--gray-300) !important;
  }
}